English verb conjugation
OUGHT TO STIFF

Regular verb: stiff - stiffed - stiffed

Affirmation

Simple form	V-ing form
I ought to stiff you ought to stiff he ought to stiff we ought to stiff you ought to stiff they ought to stiff	I ought to be stiffing you ought to be stiffing he ought to be stiffing we ought to be stiffing you ought to be stiffing they ought to be stiffing
Perfect	V-ing perfect
I ought to have stiffed you ought to have stiffed he ought to have stiffed we ought to have stiffed you ought to have stiffed they ought to have stiffed	I ought to have been stiffing you ought to have been stiffing he ought to have been stiffing we ought to have been stiffing you ought to have been stiffing they ought to have been stiffing

Negation

Simple form	V-ing form
I oughtn't to stiff you oughtn't to stiff he oughtn't to stiff we oughtn't to stiff you oughtn't to stiff they oughtn't to stiff	I oughtn't to be stiffing you oughtn't to be stiffing he oughtn't to be stiffing we oughtn't to be stiffing you oughtn't to be stiffing they oughtn't to be stiffing
Perfect	V-ing perfect
I oughtn't to have stiffed you oughtn't to have stiffed he oughtn't to have stiffed we oughtn't to have stiffed you oughtn't to have stiffed they oughtn't to have stiffed	I oughtn't to have been stiffing you oughtn't to have been stiffing he oughtn't to have been stiffing we oughtn't to have been stiffing you oughtn't to have been stiffing they oughtn't to have been stiffing

Interrogative form

Simple form	V-ing form
ought to I stiff? ought to you stiff? ought to he stiff? ought to we stiff? ought to you stiff? ought to they stiff?	ought to I be stiffing? ought to you be stiffing? ought to he be stiffing? ought to we be stiffing? ought to you be stiffing? ought to they be stiffing?
Perfect	V-ing perfect
ought to I have stiffed? ought to you have stiffed? ought to he have stiffed? ought to we have stiffed? ought to you have stiffed? ought to they have stiffed?	ought to I have been stiffing? ought to you have been stiffing? ought to he have been stiffing? ought to we have been stiffing? ought to you have been stiffing? ought to they have been stiffing?

Interro-negative form

Simple form	V-ing form
oughtn't I to stiff? oughtn't you to stiff? oughtn't he to stiff? oughtn't we to stiff? oughtn't you to stiff? oughtn't they to stiff?	oughtn't I to be stiffing? oughtn't you to be stiffing? oughtn't he to be stiffing? oughtn't we to be stiffing? oughtn't you to be stiffing? oughtn't they to be stiffing?
Perfect	V-ing perfect
oughtn't I to have stiffed? oughtn't you to have stiffed? oughtn't he to have stiffed? oughtn't we to have stiffed? oughtn't you to have stiffed? oughtn't they to have stiffed?	oughtn't I to have been stiffing? oughtn't you to have been stiffing? oughtn't he to have been stiffing? oughtn't we to have been stiffing? oughtn't you to have been stiffing? oughtn't they to have been stiffing?